Next-renew-js NPM

next-renew-js

The next-renew-js library efficiently calculates upcoming renewal dates with flexible interval options. It seamlessly handles daily, weekly, monthly, or yearly scenarios, allowing you to customize calculations based on parameters like interval and start date. Ensure accurate results, even in special cases, for precise renewal date integration.

Installation

npm install next-renew-js

Options

Option	Type	Description
interval	`number`	Represents the interval in which the renewal occurs. Example: An interval of 2 means the renewal occurs every two days, weeks, months, or years. Optional.
from	`Date`	Optional. Specifies the starting date from which the renewal should begin. Default: (current Date).
numberOfRenewals	`number`	Optional. Indicates the total number of renewals that should occur.
end_date	`Date`	Optional. Specifies an end date for the renewals.
timezone	`string`	Optional. Specifies the timezone in which the renewals should occur. Default: `undefined`.
type	`string`	Required. Specifies the type of renewal. Choose one of the following: `day`, `week`, `month`, `year`.
weekDay	`number`	Required for `week` type. Specifies the day of the week for weekly renewal (0 for Monday, and so on). Accepted values: 0 to 6.
monthDay	`number`	Required for `month` and `year` types. Specifies the day of the month when the renewal should happen. Accepted values: 1 to 31.
month	`number`	Required for `year` type. Specifies the month of the year when the yearly renewal should happen. Accepted values: 0 to 11.

Result

Property	Type	Description
`date`	`Date`	The date of the next renewal.
`list`	`Date[]`	A list of upcoming renewal dates

Usage

import nextRenew, { NextRenewOptions } from "next-renew-js";

const startingDate = new Date("2023-01-15T00:00:00.000Z")

const options: NextRenewOptions = {
  type: "month",
  monthDay: 25,
  from: startingDate, // Optional (for demonstration purposes)
};

console.log(result.date); // 2023-01-25T00:00:00.000Z
console.log(result.list); // [2023-01-25T00:00:00.000Z, 2023-02-25T00:00:00.000Z, 2023-03-25T00:00:00.000Z, ...]

In some scenarios, special situations may arise that go beyond the basic settings. One such case involves calculating the renewal day when it exceeds the maximum for the current month. In this context, if the specified day exceeds the maximum number of days in the current month, the library behaves in a special way, considering the last day of the month as the renewal day.

For example, if you specify the 31st day for monthly renewal and the current month has fewer than 31 days, the library will automatically adapt the calculation using the last day of the month.

import nextRenew, { NextRenewOptions } from "next-renew-js";

const startingDate = new Date("2023-01-15T00:00:00.000Z")

const options: NextRenewOptions = {
  type: "month",
  monthDay: 31,
  from: startingDate, // Optional (for demonstration purposes)
};

console.log(result.date); // 2023-01-31T00:00:00.000Z
console.log(result.list); // [2023-01-31T00:00:00.000Z, 2023-02-28T00:00:00.000Z, 2023-03-31T00:00:00.000Z, ...]

Utility Functions

The next-renew-js library provides the following utility functions for additional flexibility and convenience.

Function	Description
`monthsToMillis`	Converts the specified number of months to milliseconds.
`daysToMillis`	Converts the specified number of days to milliseconds.
`hoursToMillis`	Converts the specified number of hours to milliseconds.
`minutesToMillis`	Converts the specified number of minutes to milliseconds.
`cloneDate`	Creates a new Date object with the same time value as the provided Date object.
`convertToLocale`	Converts the provided date to the local timezone.
`convertToUTC`	Converts the provided date to Coordinated Universal Time (UTC) based on the specified timezone.
`numDays`	Calculates the number of days between two given dates.
`weekDayDistance`	Calculates the distance (number of days) between two weekdays (e.g., Monday to Friday).